The State University of New York

Brookhaven Science Associates, Lcc

Kenneth James Takeuchi

Esther S Takeuchi

Amy Catherine Marschilok

Stanislaus S Wong

Lei Wang

Coray McBean

Altug S Poyraz

A method of fabricating nanocomposite anode material embodying a lithium titanate (LTO)-multi-walled carbon nanotube (MWNT) composite intended for use in a lithium-ion battery includes providing multi-walled carbon nanotube (MWNTs), including nanotube surfaces, onto which functional oxygenated carboxylic acid moieties are arranged, generating 3D flower-like, lithium titanate (LTO) microspheres, including thin nanosheets and anchoring the acid-functionalized MWNTs onto surfaces of the 3D LTO microspheres by π-π interaction strategy to realize the nanocomposite anode material.

'Flower-like' LITIO-multiwalled carbon nanotube composite structures with performance as highrate anode-materials for Li-ion battery applications and methods of synthesis thereof

A novel silver-lithium-iodine solid-state energy device and system are disclosed. The rechargeable, self-assembled, dual-function, metal-iodide battery exhibits small size and high deliverable power. Inert until activation, the device may be stored for long periods of time. Upon activation, the device assembles the required electrochemical moieties for operation without external intervention. The device limits short-circuiting and self-discharge of the system by spontaneous reactions at the electrode/electrolyte interfaces, and thus is self-healing. By incorporating both silver and lithium in the same system, a dual function is achieved, whereby the characteristics of a lithium-based battery dominate at a low load and those of a silver-based battery dominate under a high load.

Solid-state silver-lithium / iodine dual-function battery formed via self-assembly

Bimetallic polyanionic materials, such as silver vanadium phosphorus oxide (AgVOPO, SVOP), are promising cathode materials for Li batteries due in part to their large capacity and high current capability. A new synthesis of AgVOPObased on microwave heating is disclosed, where the reaction time is reduced by approximately 100 times relative to other reported methods, and the crystallite size is controlled via synthesis temperature, showing a linear positive correlation of crystallite size with temperature. Reaction times of an hour or less are sufficient to render phase-pure material after reaction at 50° C. to 180° C., significantly lower than the temperatures reported for other methods. Crystallite sizes between 42 nm and 60 nm are achieved by the novel method, smaller than by other methods. Silver/vanadium atomic ratios of 1.96 to 2.04 in the as-synthesized SVOP result and appear temperature-dependent. Notably, under galvanostatic reduction, the AgVOPOsample with the smallest crystallite size delivers the highest capacity and shows the highest loaded voltage.

Synthetic methods for crystallite size control of bimetallic polyanionic battery compositions

Preparation, characterization, and an electrochemical study of MgVOprepared by a novel sol-gel method with no high-temperature post-processing are disclosed. Cyclic voltammetry showed the material to be quasi-reversible, with improved kinetics in an acetonitrile-, relative to a carbonate-, based electrolyte. Galvanostatic test data under a C/10 discharge showed a delivered capacity &#x3e;250 mAh/g over several cycles. Based on these results, a magnesium anode battery, as disclosed, would yield an average operating voltage &#x2dc;3.2 Volts with an energy density &#x2dc;800 mWh/g for the cathode material, making the newly synthesized material a viable cathode material for secondary magnesium batteries.

Electrode materials that include an active composition of the formula MgzMxOy for group II cation-based batteries

A method of synthesizing an electrode material for lithium ion batteries from FeOnanoparticles and multiwalled carbon nanotubes (MWNTs) to yield (FeO-NWNTs) composite heterostructures. The method includes linking the FeOnanoparticles and multiwalled carbon nanotubes using a &#x3c0;-&#x3c0; interaction synthesis process to yield the composite heterostructure electrode material. Since FeOhas an intermediate voltage, it can be considered an anode (when paired with a higher voltage material) or a cathode (when paired with a lower voltage material).

Magnetite (FeO)&#x2014;multiwalled carbon nanotube composite structures with performance as high rate electrode materials for Li-ion batteries

A binder-free, self-supporting electrode including an electrochemically active material in the absence of a binder and a current collector is claimed. The electrochemically active material is a self-supporting transition metal oxide. A method of regenerating the electrode to restore capacity of the electrode is also claimed.

Regenerable battery electrode

This invention relates to the field of energy storage devices, and especially electrochemical energy storage devices where an electroactive moiety is chemically attached to a conductive polymer In particular, the invention relates to the design and fabrication of electrodes for the use in electrochemical storage devices having an electrochemically active conjugate. The electrochemically active conjugate preferably has an electroactive moiety selected from electroactive metal center, an electroactive organic species, or an electroactive non-metal species. Depending on the selected electroactive moiety, it can be attached either directly or through an appropriate linker to the conductive polymer.

Stable electrochemically active cojugate including electrochemical moiety covalently linked to conductive polymer and electrochemical storage cell using the same

A method of fabricating nanocomposite anode material embodying a lithium titanate (LTO)-multi-walled carbon nanotube (MWNT) composite intended for use in a lithium-ion battery includes providing multi-walled carbon nanotube (MWNTs), including nanotube surfaces, onto which functional oxygenated carboxylic acid moieties are arranged, generating 3D flower-like, lithium titanate (LTO) microspheres, including thin nanosheets and anchoring the acid-functionalized MWNTs onto surfaces of the 3D LTO microspheres by &#x3c0;-&#x3c0; interaction strategy to realize the nanocomposite anode material.

'Flower-like' LiTiO-multiwalled carbon nanotube composite structures with performance as highrate anode-materials for li-ion battery applications and methods of synthesis thereof

Low-temperature synthesis process of making MgzMxOy, where M is Mn, V or Fe, for manufacture of electrode materials for group II cation-based batteries

This invention relates to the field of energy storage devices, and especially electrochemical energy storage devices including electrolytes comprising an ionic liquid, one or more solvents, and one or more salts of a Group 2 element. Effects on electrochemical performance of the electrolyte of each of the components of the electrolyte were systematically determined. In addition, interactions between the electrolytes and separator films were dissected to optimize electrochemical performance of coin cell batteries.

Growing community of inventors

South Setauket, NY, United States of America

Kenneth James Takeuchi